Most first orders go wrong before anyone clicks pay. Buyers pick rows first. That reverses the priorities, so settle three things first, in this order.
Each step is small on its own. Together they stop a first order from becoming a pile of rows bought on impulse, which is the usual way a modest budget goes wrong.
Decide which page the links serve
Write down the one page you most want found, then choose the rest of the basket around it. For a coach that is often the offer page, with the home page as the safer second target. A profile with no clear destination looks random, to readers and to crawlers.
If you cannot name that page yet, the problem is the page, not the budget. Fix it first, then return to the basket.
Read the donor before the price
A cheap row on a site your clients never visit is still a poor purchase. Check traffic, niche and language before you look at the total, because a price only means something once the fit is clear.
Open the donor and read one article. If it feels like filler, skip it, even when the number on the row looks good.
Pick the anchor family before the donor
Decide which anchors you will use before you filter a single row. Your name, your business name and the bare address cover most of a personal site, and knowing that list first stops a donor from pulling you toward one exact phrase.
Once the families are fixed, the donor either fits the plan or it does not. That makes the choice calmer, because you compare rows against a plan rather than against a headline number.
Keep money back on purpose
Hold part of the budget in reserve rather than spending it in one go. The reserve lets you replace a donor that turns out thinner than its row, and it stops you buying again out of nerves.
A reserve is not a failure to spend. It is the part of the plan that protects the rest.
